diff --git a/entity/Letter.py b/entity/Letter.py
index e5b4113..5a05a92 100644
--- a/entity/Letter.py
+++ b/entity/Letter.py
@@ -1,7 +1,7 @@
 class Letter:
     sign = "计算得到"
     encryptType = "SM4-GCM"
-    encryptKey = "计算获得"
+    encryptKey = "计算获得" # recvPubKey 加密后的 对称加密秘钥 数据
     recvPubKey = ""
     senderPubKey = ""
 
diff --git a/tool/asymmetric/RSA.py b/tool/asymmetric/RSA.py
index 4356b16..f6bdc49 100644
--- a/tool/asymmetric/RSA.py
+++ b/tool/asymmetric/RSA.py
@@ -21,7 +21,13 @@ def generate_keys(priKeySavePath, pubKeySavePath):
     with open(pubKeySavePath, "wb") as f:
         f.write(public_key)
 
-
+"""
+输入：
+需要公私钥加解密的消息：字节类型
+公私钥：base64
+输出：
+加解密后的数据：字节类型
+"""
 def encrypt_message(message: bytes, public_key_base64):
     # 加载公钥
     public_key_bin = base64.b64decode(public_key_base64)